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2024 (engelsk)Inngår i: IEEE Transactions on Sustainable Energy, ISSN 1949-3029, E-ISSN 1949-3037, Vol. 15, nr 3, s. 1627-1639Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]
Hybrid energy storage system (HESS) is effective to compensate for fluctuation power in renewables and fast fluctuation loads in DC microgrids. To regulate DC bus voltage, a power management strategy is an essential issue. In the meantime, the increasing integration of constant power loads (CPLs) in DC microgrids brings great challenges to stable operation due to their negative incremental impedance. In this paper, a fast composite backstepping control (FBC) method is proposed for the HESS to achieve faster dynamics, smaller voltage variations, and large-signal stabilization. In the FBC method, a higher order sliding mode observer (HOSMO) is adopted to estimate the coupled disturbances. Furthermore, the FBC method is integrated with the droop control; so that the FBC-based decentralized power allocation (FBC-DPA) strategy for HESS in DC microgrids is developed. The proposed FBC method is designed based on the Lyapunov function to ensure its stability. Moreover, the design guidelines are provided to facilitate the application of the proposed method. Both simulation and experimental studies under different operating scenarios show that the proposed method achieves faster voltage recovery and smaller voltage variations than the conventional backstepping control method.
sted, utgiver, år, opplag, sider
Institute of Electrical and Electronics Engineers (IEEE), 2024
Emneord
Microgrids, Voltage control, Stability analysis, Observers, Resource management, Energy storage, Backstepping, Backstepping control, higher order sliding mode observer, decentralized control, constant power loads, hybrid energy storage system, dc microgrid
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-350504 (URN)10.1109/TSTE.2024.3364653 (DOI)001252808200035 ()2-s2.0-85187280431 (Scopus ID)
Merknad
QC 20240716
2024-07-162024-07-162024-07-16bibliografisk kontrollert